Trane TR150 Service Manual page 36

Troubleshooting
WARNING/ALARM 11, Motor thermistor over temp
Check whether the thermistor is disconnected. Select
whether the frequency converter issues a warning or an
alarm in parameter 1-90 Motor Thermal Protection.
WARNING
Live Electrical Components!
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded.
•
When using terminal 53 or 54, check that the
thermistor is connected correctly between either
terminal 53 or 54 (analog voltage input) and
terminal 50 (+10 V supply). Also check that the
terminal switch for 53 or 54 is set for voltage.
Check that parameter 1-93 Thermistor Resource
selects terminal 53 or 54.
•
When using terminal 18, 19, 31, 32, or 33 (digital
inputs), check that the thermistor is connected
correctly between the digital input terminal used
(digital input PNP only) and terminal 50. Select
the terminal to use in parameter 1-93 Thermistor
Resource.
WARNING
Disconnect power before proceeding.
WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts about 1.5 s,
then the frequency converter trips and issues an alarm.
Shock loading or fast acceleration with high inertia loads
can cause this fault.
Troubleshooting:
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the frequency
converter.
Check parameters 1-20 to 1-25 for correct motor
data.
ALARM 14, Earth (ground) fault
There is current from the output phase to ground, either in
the cable between the frequency converter and the motor,
or in the motor itself. The current transducers detect the
ground fault by measuring current going out from the
frequency converter and current going into the frequency
converter from the motor. Ground fault is issued if the
deviation of the 2 currents is too large. The current going
out of the frequency converter must be the same as the
current going into the frequency converter.
BAS-SVM04B-EN
TR150 and TR170 Service Manual
Troubleshooting
•
•
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WARNING
Disconnect power before proceeding.
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
•
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualified personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
WARNING
Disconnect power before proceeding.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning is only active when parameter 8-04 Control
Word Timeout Function is NOT set to [0] Off.
If parameter 8-04 Control Word Timeout Function is set to [5]
Stop and Trip, a warning appears. The frequency converter
then ramps down until it trips, while giving an alarm.
Parameter 8-03 Control Timeout Time could possibly be
increased.
WARNING
Live Electrical Components!
Troubleshooting
•
•
•
02/2017 All rights reserved.
Remove power to the frequency converter and
repair the ground fault.
Check for ground faults in the motor by
measuring the resistance to ground of the motor
cables and the motor with a megohmmeter.
Reset any potential individual offset in the 3
current transducers in the frequency converter.
Perform the manual initialization or perform a
complete AMA. This method is most relevant
after changing the power card.
Remove the power to the frequency converter
and repair the short circuit.
Disconnect power before proceeding.
Check connections on the serial communication
cable.
Increase parameter 8-03 Control Word Timeout
Time.
Check the operation of the communication
equipment.
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